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How to Restore Timber Sash Windows in Cambridge

Many homes in Cambridge have traditional sash windows and the homeowners are proud of their appearance. Sash windows can become stuck and become difficult to open or close. This is often due moisture, which can cause the timber to swell.

Traditionally, window boxes utilized chains, cotton cords or weights made of lead to operate. Modern sash windows come with hidden springs to overcome this issue.

1. Aesthetics

Contrary to PVC-u windows which are manufactured to modular imperial sizes, timber sash windows can be restored to their original dimensions. This allows the restoration to meet modern day energy requirements while complying with conservation regulations for the area. It also comes with a window that is far superior to uPVC alternatives.

Sliding windows with sash were initially only used in large structures or public buildings, but this changed when production became less expensive and craftsmen could produce larger frames with more glass. By the end of the 18th century, sash windows were the most sought-after wooden style in British homes. Sash windows were simple to operate and allowed light to enter rooms without the use of curtains.

The early windows were made of clear glass, but in the 17th century sash windows started to become more ornamental. They were initially made of colored glazing bars or mullions. These were very expensive at the time, but as glass production improved and less expensive, they became a feature of many of the period homes.

By the 19th century it was possible to manufacture large, strong glass that did not need supporting bars. This allowed for the frame to be made larger and, in turn, gave an improved view. This was an important innovation.

The introduction of the double-hung sliding sash was another significant improvement that came about at the end of the I920s and at the beginning of the I930s. The double-hung sliding sash is another significant improvement that came about at the end of the I920s and at the beginning of the I930s.

The most common kind of sash is made of slow-growing deal (pine) but oak was used in the more expensive buildings as well as in earlier examples. It is important to maintain the separation bead that divides the sashes. This will help prevent draughts and rattles. It is also crucial that sash pulleys and idler wheels are kept in good condition as these assist in operating the window.

2. Energy efficiency

Sash windows replaced hinged casements as clearer and larger sheets were made available. They were coated with plate glass that was set within rebated timber frames and then pinned with glazing sprigs, and then putty on both sides to create a watertight seal. This form of glazing gradually replaced the leaded light bulbs.

Sashes were introduced, which led to increased demand for ironmongery. The most common fittings included brass pulleys (and later cast-iron) weights and stoppers for sashes shutter hinges, handles and shutter hinges, and a variety of fasteners used to fix the sashes. These were usually decorated with designs, inscriptions, and engravings to identify the maker.

Sash windows can be very energy-efficient with regular maintenance. However, without this maintenance they can become drafty and let in cold air. Paint and putty can also cause draughts. This can be corrected making use of wood-to-timber repair tools that are proprietary.

The market for replacement windows rests on the perception that older windows are old and beyond economical repair, whereas they can be maintained with just a little care. Repairs can be expensive and cause lots of disruption to the home. To prevent this, many homeowners opt for a complete replacement with PVC-u windows made by one of the largest 'one stop shop' installation companies. They can replace all windows in a house in one day, saving time and eliminating the need for different tradesmen to coordinate. They are also available with energy-saving double-glazing, which can achieve greater energy efficiency than traditional windows made of sash. However double-glazed windows cannot duplicate the proportions and section of traditional timber sashes.

3. Security

It is possible to secure windows that are traditional without compromising their style. Ironmongery such as sash chain, mortice bolts and sash lock could be used. These can be put in place to ensure that the window is able to be opened for Ventilation Repair Cambridgeshire or cleaning. These products are often unobtrusive as they are designed to complement sash windows. They can be used in conjunction with traditional sash-window catchers, which are required to be replaced with more robust versions (such as those incorporating double screws) or spring-loaded levers to minimize the possibility of them being opened by hammering.

Sash-window frames were constructed from slow grown deal or, in more luxurious homes made of oak. If the glazing bars are intact and are not damaged, they should be left. Where possible, the timber cills should be replaced with wood that is in line with. PVC-U companies usually provide a one-stop shop installation service, which includes removing and replacing windows across a house in a day without the need to involve other tradespeople or coordinate visits from different suppliers.

4. Ventilation

Sash windows were introduced in the 17th century and allowed for a large amount of light into buildings. By the end 18th century, they had been adapted so that even more light could be let into the rooms. Larger glass panes were also made. The result was a lighter appearance and windows with a higher quality of design than before.

The introduction of sash windows also required a new range of ironmongery. Early pulleys could be made from wood. Later Victorian ones were made of brass or a combination of leaded and wood. There were also different kinds of knobs and shutter hinges. These ironmongery pieces should be cleaned and preserved to appreciate their exquisite design.

To ensure they remain in good condition, timber windows need to be maintained. Inattention to maintenance could lead to:

Sashes that don't slide effortlessly.

Holes in the frame that allow water to enter and cause damage and decay.

The putty can be soaked by water and cause decay to the frame or cill.

In the I920s and I930s steel casement windows increased in popularity because they were strong, slim and cheap, and complemented the vogue for healthy living. Studies have shown that softwood sash window are as efficient as PVC-u windows, and may even be more attractive.

The window replacement industry was able to convince homeowners that their old windows were rotten, drafty and beyond economical repair. The reality is that many older windows made of timber are in good condition and, with minor repairs to upvc doors, could easily be serviceable for many years to be.

5. Maintenance

Traditional sash windows require regular maintenance and inspection. If you don't maintain your sash window, it can cause the sash cords breaking, and the glazing bars wearing out excessively. It can also cause paint and putty to deteriorate. The removal of sashes may also cause structural movement in the frame, which can cause the sash not to close properly. It is also possible for the sash be stuck or fixed in the open position and let water and draughts in the structure.

The damage to timber windows is usually caused by moisture entry. This can be prevented with thorough painting, periodic repairs and elimination of the source of dampness. Wet rot can be identified due to the wavy appearance of the paint that can be stripped away to reveal soft, rotting wood. Any rotten timber sections should be cut off and the affected part carefully cut or pieced with replacements made from the same type of timber as the ones that remain. This method of repair maximizes the amount original fabric and is one of least invasive ways to treat wood-to-timber rot.

A resin-based wood condenser is a viable alternative to traditional sanding or staining. This is brushed onto the surface of the wood to help stabilize it and protect it from further damage. It is particularly useful for treating sash and pulley cords, where it can prevent breakage.

It is crucial to restore and not replace any historic ironmongery such as stay latches and sash latches. It is difficult to replace these items without altering their original design. It is also advised that fittings made of aluminum, such as sashlifts and chainstays, should be avoided since they could cause corrosion and deterioration of timber frames and sashes.